Linux C/C++ 字符集转换,UTF(2)

例子1: 用C语言实现的转换示例程序

/* f.c : 代码转换示例C程序 */
   #include <iconv.h>
   #define OUTLEN 255
   main()
   {
   char *in_utf8 = "姝ｅ?ㄥ??瑁?";
   char *in_gb2312 = "正在安装";
   char out[OUTLEN];

//unicode码转为gb2312码
   rc = u2g(in_utf8,strlen(in_utf8),out,OUTLEN);
   printf("unicode-->gb2312 out=%sn",out);
   //gb2312码转为unicode码
   rc = g2u(in_gb2312,strlen(in_gb2312),out,OUTLEN);
   printf("gb2312-->unicode out=%sn",out);
   }
   //代码转换:从一种编码转为另一种编码
   int code_convert(char *from_charset,char *to_charset,char *inbuf,int inlen,char *outbuf,int outlen)
   {
   iconv_t cd;
   int rc;
   char **pin = &inbuf;
   char **pout = &outbuf;

cd = iconv_open(to_charset,from_charset);
   if (cd==0) return -1;
   memset(outbuf,0,outlen);
   if (iconv(cd,pin,&inlen,pout,&outlen)==-1) return -1;
   iconv_close(cd);
   return 0;
   }
   //UNICODE码转为GB2312码
   int u2g(char *inbuf,int inlen,char *outbuf,int outlen)
   {
   return code_convert("utf-8","gb2312",inbuf,inlen,outbuf,outlen);
   }
   //GB2312码转为UNICODE码
   int g2u(char *inbuf,size_t inlen,char *outbuf,size_t outlen)
   {
   return code_convert("gb2312","utf-8",inbuf,inlen,outbuf,outlen);
   }

例子2: 用C++语言实现的转换示例程序

/* f.cpp : 代码转换示例C++程序 */
   #include <iconv.h>
   #include <iostream>

#define OUTLEN 255

using namespace std;

// 代码转换操作类
   class CodeConverter {
   private:
   iconv_t cd;
   public:
   // 构造
   CodeConverter(const char *from_charset,const char *to_charset) {
   cd = iconv_open(to_charset,from_charset);
   }

// 析构
   ~CodeConverter() {
   iconv_close(cd);
   }

// 转换输出
   int convert(char *inbuf,int inlen,char *outbuf,int outlen) {
   char **pin = &inbuf;
   char **pout = &outbuf;

memset(outbuf,0,outlen);
   return iconv(cd,pin,(size_t *)&inlen,pout,(size_t *)&outlen);
   }
   };

int main(int argc, char **argv)
   {
   char *in_utf8 = "姝ｅ?ㄥ??瑁?";
   char *in_gb2312 = "正在安装";
   char out[OUTLEN];

// utf-8-->gb2312
   CodeConverter cc = CodeConverter("utf-8","gb2312");
   cc.convert(in_utf8,strlen(in_utf8),out,OUTLEN);
   cout << "utf-8-->gb2312 in=" << in_utf8 << ",out=" << out << endl;

// gb2312-->utf-8
   CodeConverter cc2 = CodeConverter("gb2312","utf-8");
   cc2.convert(in_gb2312,strlen(in_gb2312),out,OUTLEN);
   cout << "gb2312-->utf-8 in=" << in_gb2312 << ",out=" << out << endl;
   }